[bug 439015] Use oxygen icons in app menu in kickoff

You may or may not have noticed bug 439015. Which is hicolor icons being used in the Kickoff application menu, and not Oxygen icons as you’d of course expect and prefer.

So I went through the trouble of finding suitable Oxygen replacements for the ~130 icons in the openSUSE menu system making the desktop experience just a little more polished. I’ve submitted them to bugzilla and I expect them to be in openSUSE 11.2. I also rebuilt the desktop-data-openSUSE package with Oxygen icons in my home repository on the Build Service, enabling you to easily fix the problem on 11.1 too, with 1-click install